I (21M) have been best friends with this guy (19M) for about 5 years. We were super close—he was like a brother to me. I always stood up for him when people talked badly about him, always had his back.

Here’s the backstory: About 3 years ago, he messaged a girl a couple of times. Nothing serious—just a few chats, and then it fizzled out. Fast forward to 2 years ago, that same girl ended up in my class. We became close friends for a few months, and I developed a crush on her. I liked her for maybe 5 months total, but I never made a move or confessed anything. Everyone, including my best friend, knew I liked her. I even told him, but also said I’d never act on it. That was it. I haven’t talked to her in over a year now.

A couple of months ago, he asked me if I still liked her. I said no, and that was the truth. I’d moved on, and I hadn’t even spoken to her in over a year.

Now, both our classes went on a month-long trip recently, but I couldn’t go due to personal issues. They got back today, and I heard through the grapevine that he and the girl got together during the trip. I didn’t really care—like I said, it was just a small crush 2 years ago.

Then today, he pulled me aside to “talk.” There were four other people in the room, including a friend who knew the whole story. I honestly thought he was going to apologize for something he’d done before the trip that had upset me.

Instead, he told me he’d decided to cut me off completely. His reason? That I hadn’t been “honest” with him about liking the girl. Which is not true at all—he knew, everyone knew, and I even told him directly. I tried explaining that to him, but he kept interrupting me with “yeah, yeah, yap yap,” like he didn’t care.

At that point, I snapped. I told him I’ve never seen a more pathetic male friend who’d throw away a 5-year friendship over something this dumb. I also called him a few other names out of frustration. No one else in the room really understood what was happening, because we were speaking in a different language than they spoke.

Now I’m wondering if I went too far. I did lash out, and maybe I should’ve kept my cool. But I also feel completely betrayed, especially after I considered him as a brother and i was so surprised that I would never except a guy like him would ruin this friendship for the stupidest thing ever.

So, AITA for losing it on him after he cut me off over something from the past?